Summit Leadership

Leading the NAIIS

TAN-Headshot-June-2013-Color-smlL.J TAN, MS, PhD

Dr. L.J Tan is the Chief Strategy Officer for the Immunization Action Coalition, which he joined in January 2013. There, L.J is leading the IAC’s new strategic direction on national immunization advocacy and policy development. Prior to that, L.J was the Director of Medicine and Public Health at the American Medical Association (AMA) for 15 years, where he led multiple AMA efforts in immunizations and infectious diseases, prevention and health promotion, aging and community health, and eliminating healthcare disparities and improving the health of physicians.

Dr. Tan received his PhD in Immunology/Microbiology from Northwestern University Medical School, and completed a postdoctoral fellowship in Molecular Immunology at the University of Chicago Hospitals.

Dr. Tan was recently elected onto the National Quality Forum’s Adult Immunizations Expert Committee, onto the European Society of Clinical Microbiology and Infectious Diseases Vaccine Study Group (EVASG), and serves as an editor for BMC Infectious Diseases.

He just completed his term as an elected member of the federal National Vaccine Advisory Committee (NVAC). He still serves on the NVAC’s HPV, Vaccine Confidence, and Maternal Immunization working groups. Previously, L.J chaired the Immunization Infrastructure Working Group and also served on the vaccine safety Workgin.

Dr. Tan has also served as a member of the federal Advisory Committee for Immunization Practices (ACIP), and he still serves on the Adult Immunization working group. Previously, L.J also served on the influenza, zoster, and evidence-based working groups.

Dr. Tan co-founded (with the CDC and the NVPO) and currently co-chairs the National Adult and Influenza Immunization Summit, and founded and organized the first National Immunization Congress in 2007, and organized the Second National Immunization Congress in 2010. He served as a primary consultant for the first European Union Influenza Summit in 2011, and the first Asian Pacific Influenza Summit in 2012, and continues to advise those bodies.

He serves or has served on the Steering Committees for the 317 Coalition, the National Network for Immunization Information (NNii), the Partnership to End Cervical Cancer, the National Viral Hepatitis Roundtable, and the Scientific Advisory Boards for the Immunization Action Coalition and Coalition for Safe Community Needle Disposal.

L.J is a member of numerous professional organizations including the American Public Health Association, the Federation of American Societies for Experimental Biology, the American Society of Microbiology, the American Association of Immunologists, the National Council of Asian & Pacific Islander Physicians, and the Infectious Diseases Society of America.


Dr. Angela Shen is a Senior Advisor at the National Vaccine Program Office. She leads a portfolio around adult immunization, quality measurement, vaccine and immunization financing, and innovation. Dr. Shen works with a wide range of stakeholders, federal and non-federal, across the immunization system.

She has broad experience in public health practice, regulatory science, and epidemiology and previously held various scientific, technical, and policy positions at the U.S. Agency for International Development (USAID), the Center for Biologics Evaluation and Research at the U.S. Food and Drug Administration (FDA), and the U.S. Centers for Disease Control and Prevention (CDC). She is a graduate of Tulane University School of Public Health and Tropical Medicine, Loma Linda University School of Public Health, and the University of California at Los Angeles (UCLA) and holds the rank of Captain as a commissioned officer in the U.S. Public Health Service. Dr. Shen holds adjunct appointments at Johns Hopkins University School of Public Health and Drexel University School of Public Health.